Cronyx E1XL, User Manual

Page 1: ...ltiframe align ment G 703 2 048 kbps unframed mode Cronyx PCM2 modem compatibility Data rates from 64 to 2 048 kbps Timing from the digital interface of receive and transmit path DTE emulation Three t...

Page 2: ...Insert multiplexer mode 8 Controls and indicators 9 Front panel controls 9 Front panel indicators 9 Jumpers 9 Line impedance 9 Programming mode 10 DIP switches 10 Console 10 Configuration parameters...

Page 3: ...back 21 Alarm interface 22 Back panel connectors 22 Management using a console 24 Ethernet interface 30 Upgrade of on board firmware 31 Synchronous data transmission 32 Considerations on building sync...

Page 4: ...s Signal level at receiver input 0 to 36 dB max 1 5 km distance via 0 6 mm twisted pairs Transmit path synchronization from the internal clock generator or from E1 0 link receive path or from E1 1 lin...

Page 5: ...t interface form a Remote Bridge for interconnecting two LANs In the unframed mode you can use a Cronyx E1XL device together with a Cronyx PCM2 modem The rack mount version of the multiplexer represen...

Page 6: ...with ones Data from selected timeslots of a corresponding E1 link arrives at the digital port output Unused timeslots are ignored In this mode the framing of data in E1 flow can be disabled so as dat...

Page 7: ...link but use different timeslots Unused timeslots are translated into E1 1 link Two devices connected by E1 link enable the transmission of data between digital ports There should be no cross connect...

Page 8: ...mmunications between PBXs E1 link E1 link E1 link Front panel controls E1 XL in Drop Insert multiplexer mode Control port To RS 232 terminal E1 link max 1 5 km Digital interface 0 E1 link max 1 5 km D...

Page 9: ...s IndicatorFunction PWR AC power present RTS digital interface signals RERR remote device errors LERR local device errors TST testing modes Ethernet port RTS indicator shows that the port has a fault...

Page 10: ...odes The following designations are used to show positions of the microswitches OFF position ON position Console The front panel of the multiplexer is equipped with a DB9 connector intended for connec...

Page 11: ...10 microswitch position determines E1XL link configuration S3 10 Configuration two independent links multiplexer Selection of data insert link In multiplexer mode S3 6 and S3 8 microswitches determin...

Page 12: ...nabled Disabled alignment Timeslot 16 Data transmission Data transmission assignment CAS multiframe alignment Location of TS0 bit Sa4 Any bit of any monitoring channel timeslot at your choice in E1 fr...

Page 13: ...rarily select a bit of any timeslot for the monitoring channel When DIP switches are used to set configuration parameters the monitoring channel uses Sa4 bit of timeslot 0 in compliance with ITU T G 7...

Page 14: ...imeslot 23 timeslot 24 timeslot 25 timeslot 26 timeslot 27 timeslot 28 timeslot 29 timeslot 30 timeslot 31 S1 6 S1 10 number link 0 rate S2 6 S2 10 number link 1 rate 0 timeslots 0 kbps 1 timeslot 64...

Page 15: ...data at the output of RXD digital port for ERC clocks is executed using FIFO buffer To ensure the correct buffer operation with no overruns underruns the frequency of clocks received from the line sh...

Page 16: ...e only When DIP switches are used to set configuration parameters the loopback activation on a remote request is always enabled Scrambler The parameter applies to the unframed mode only The scrambler...

Page 17: ...345678901212345678901234567 Copyright 2001 Cronyx 17 Separate timing sources Receive and transmit lines of E1 path are fully independent and can have separate timing sources Below is an example of suc...

Page 18: ...en E1 links due to different clock frequencies that in turn will cause a retransmission loss of data frames DTE emulation There are two clock pulse inputs ERC and ETC provided for connection of E1XL m...

Page 19: ...zation of data at the output of RXD digital port for ERC clocks is executed using FIFO buffer To ensure the correct buffer operation with no overruns underruns the frequency of clocks received from th...

Page 20: ...ted to E1XL digital port DTE1 and DTE2 emulation modes always make sure that clock signal parameters comply with ITU T standards X 21 interface Electric specifications of X 21 interface signals meet t...

Page 21: ...hoose the number of E1 link The remote device automatically enables and disables local loopbacks on requests from the local device Digital loopback LOOP1 switch is in DIG position LOOP2 switch is used...

Page 22: ...ly and the carrier are present pin 3 is shorted to pin 1 At a power failure or a loss of the carrier pin 3 gets disconnected from pin 1 and shorted to pin 2 an alarm state External input contacts has...

Page 23: ...th X 21 interface use DB15 female connectors DB 15 female RS 232 Direction 2 T A Input 9 T B Input 4 R A Output 11 R B Output 7 ETC A Input 14 ETC B Input 6 S A Output 13 S B Output 3 C A Input 10 C B...

Page 24: ...t device modes from the console and save them in a non volatile memory Some parameters can be set from the console only For a list of parameters see page 12 The console user interface is implemented a...

Page 25: ...a single timing source in the link is not met in DTE2 mode timing from ERC clocks Async FIFO buffer error 1 Data rate or asynchronous code format set at the port do not match settings defined on the...

Page 26: ...frame alignment at a remote modem CRCE Checksum error RCRCE Checksum error at a remote modem Loopback menu is used to control local digital and remote loopbacks Test menu allows to enable disable a bu...

Page 27: ...0 High gain Use16 no CRC4 Mon Sa4 Link 1 TP Sync Port 0 High gain Use16 no CRC4 Mon Sa4 Port 0 960 kbps Drop0 Insert0 CTS 1 Cable direct RS 530 DTR RTS ETC ERC DSR CTS CD TXC RXC Port 1 960 kbps Drop...

Page 28: ...nc Link 0 High gain Use16 no CRC4 Mon Sa4 Link 1 TP Sync Link 0 High gain Use16 no CRC4 Mon Sa4 Port 0 115200 baud 8n1 Drop0 Insert0 CTS 1 Cable not attached DSR CTS no CD Port 1 960 kbps Drop0 Insert...

Page 29: ...0 1920 kbps CTS 1 Port 1 1920 kbps CTS 1 1 3 5 7 9 1 3 5 7 9 1 3 5 7 9 1 Timeslots 0 Timeslots 1 Dual mode use TS16 for data Two independent devices mode Timeslot 16 is used for data transmission Mod...

Page 30: ...e16 no CRC4 Mon Sa4 Port 0 64 kbps Drop0 Insert1 CTS 1 Port 1 64 kbps Drop1 Insert0 CTS 1 1 3 5 7 9 1 3 5 7 9 1 3 5 7 9 1 Timeslots 0 Timeslots 1 Ethernet interface Ethernet interface complies with 10...

Page 31: ...The software package includes detailed instructions describing the download procedure Statistics Session 21 0 days 00 00 29 Mode Smart Dual Link 0 TP Sync Int High gain Use16 no CRC4 Mon Sa4 Link 1 T...

Page 32: ...companied by RXC clocks while TXD data is accompanied by TXC clocks Modem line interfaces G 703 xDSL etc use self synchronizing codes HDB3 Manchester 2B1Q etc allowing to transmit both data and clocks...

Page 33: ...d on the principle of using a single timing source It means that a data link between two DTE devices uses the same clock generator for timing all the data flows in the link The transmission of clocks...

Page 34: ...figure depicts an occurrence of the error when data is read in DCE at the very moment it is being changed It leads to an erroneous reception of data from the router The probability of such a situation...

Page 35: ...n EXT In this case you can select ETC input as a transmit path timing source for one of the modems only Here the modem which does not have such a mode defined will receive data at TXD input using cloc...

Page 36: ...runs depending on what side of the buffer has clocks of higher frequency If data transmitted over the link represents HDLC format packets the frequencies offset can be compensated owing to the fact th...

Page 37: ...C RTS GND A A GND GND B B GND V 35 cable for connecting to DCE with external transmit clocks for a multi standard interface DTE1 emulation mode HDB44 Direction M34 male male TXD a 10 R RXD a TXD b 25...

Page 38: ...ed CTS 15 Not connected ERC a 17 Y TXC a ERC b 18 AA TXC b GND 1 A GND GND 16 B GND SEL x 31 39 41 43 32 Connect to GND 1 V 35 cable for a multi standard interface HDB44 Direction M34 male female TXD...

Page 39: ...25 DTR a 11 12 DTR b 26 30 DSR a 13 11 DSR b 28 29 CTS a 15 9 CTS b 30 27 CD a 12 13 CD b 27 31 GND 1 1 GND 16 19 SEL x 31 33 37 Connect to GND 1 Cable for connecting two devices with a multi standar...

Page 40: ...imeslots E1 0 Sync timing source of E1 0 transmit path E1 1 Sync timing source of E1 1 transmit path internal clock generator from the receiver from the receiver of the other link from the digital int...